Question

An atom of an element has two electrons in M shell what is
a. atomic number
b. number of protons in this element
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Answer 1

Explanation:

This is from old syllabus

L occupies 2 electrons

M occupies 8 electrons

Here 2 in M implies that

Atomic number is 4

Number of proton = Atomic number = 4

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Answer 2

Explanation:

if M shell has 2 electrons

then K has 2 and L has 8

so no.of electrons is atomic no.

2+8+2=12

no.of protons is equal to no. of electons

So no. of protons are 12

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